EP3135329A1 - Discharger with improved piercing tip - Google Patents

Discharger with improved piercing tip Download PDF

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Publication number
EP3135329A1
EP3135329A1 EP15182941.3A EP15182941A EP3135329A1 EP 3135329 A1 EP3135329 A1 EP 3135329A1 EP 15182941 A EP15182941 A EP 15182941A EP 3135329 A1 EP3135329 A1 EP 3135329A1
Authority
EP
European Patent Office
Prior art keywords
piercing tip
axis
discharger
fluid
carriage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP15182941.3A
Other languages
German (de)
English (en)
French (fr)
Inventor
Josef Ettlin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Medmix Switzerland AG
Original Assignee
Sulzer Mixpac AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sulzer Mixpac AG filed Critical Sulzer Mixpac AG
Priority to EP15182941.3A priority Critical patent/EP3135329A1/en
Priority to CN201680050491.8A priority patent/CN107921213A/zh
Priority to KR1020187008911A priority patent/KR20180048860A/ko
Priority to EP16759997.6A priority patent/EP3316936B1/en
Priority to JP2018510979A priority patent/JP6873976B2/ja
Priority to PCT/EP2016/069720 priority patent/WO2017036823A1/en
Priority to BR112018003432A priority patent/BR112018003432A2/pt
Priority to US15/755,838 priority patent/US11040143B2/en
Publication of EP3135329A1 publication Critical patent/EP3135329A1/en
Priority to US17/319,510 priority patent/US11964134B2/en
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/24—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic
    • A61M5/2455—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic with sealing means to be broken or opened
    • A61M5/2466—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic with sealing means to be broken or opened by piercing without internal pressure increase
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C19/00—Dental auxiliary appliances
    • A61C19/06—Implements for therapeutic treatment
    • A61C19/063—Medicament applicators for teeth or gums, e.g. treatment with fluorides
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61D—VETERINARY INSTRUMENTS, IMPLEMENTS, TOOLS, OR METHODS
    • A61D7/00—Devices or methods for introducing solid, liquid, or gaseous remedies or other materials into or onto the bodies of animals
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/24—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/24—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic
    • A61M5/2422—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic using emptying means to expel or eject media, e.g. pistons, deformation of the ampoule, or telescoping of the ampoule
    • A61M5/2429—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic using emptying means to expel or eject media, e.g. pistons, deformation of the ampoule, or telescoping of the ampoule by telescoping of ampoules or carpules with the syringe body
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/28—Syringe ampoules or carpules, i.e. ampoules or carpules provided with a needle
    • A61M5/281—Syringe ampoules or carpules, i.e. ampoules or carpules provided with a needle using emptying means to expel or eject media, e.g. pistons, deformation of the ampoule, or telescoping of the ampoule
    • A61M5/283—Syringe ampoules or carpules, i.e. ampoules or carpules provided with a needle using emptying means to expel or eject media, e.g. pistons, deformation of the ampoule, or telescoping of the ampoule by telescoping of ampoules or carpules with the syringe body
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/28—Syringe ampoules or carpules, i.e. ampoules or carpules provided with a needle
    • A61M5/285—Syringe ampoules or carpules, i.e. ampoules or carpules provided with a needle with sealing means to be broken or opened
    • A61M5/288—Syringe ampoules or carpules, i.e. ampoules or carpules provided with a needle with sealing means to be broken or opened by piercing without internal pressure increase
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
    • A61M5/31566—Means improving security or handling thereof
    • A61M5/31571—Means preventing accidental administration
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
    • A61M5/31566—Means improving security or handling thereof
    • A61M5/31573—Accuracy improving means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/24—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic
    • A61M5/2455—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic with sealing means to be broken or opened
    • A61M5/2466—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic with sealing means to be broken or opened by piercing without internal pressure increase
    • A61M2005/247—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic with sealing means to be broken or opened by piercing without internal pressure increase with fixed or steady piercing means, e.g. piercing under movement of ampoule

Definitions

  • the present disclosure relates to a discharger for discharging a predetermined amount of fluid and to a discharge system comprising the discharger.
  • the present disclosure further relates to the use of the discharger and the discharge system for discharging a fluid including at least one medical, dental or veterinary agent.
  • Dischargers such as expendable syringes for use in the medical, dental or veterinary field are generally known which comprise one or more compartments in which the medical, dental or veterinary agent or a liquid including the medical, dental or veterinary agent is contained before use.
  • the compartments are normally sealed with various kinds of barrier foils in order to isolate its contents from the environment.
  • the foil Before discharging the content of such a compartment the foil must be pierced by a plunger, spike or tip of suitable shape and hardness. Depending on the type of discharger also a flow connection between the compartment and a hollow spike or tip needs to be established, where appropriate. It is, on the one hand, important that the foil gets reliably pierced and, on the other hand, that the hollow spike or tip does not become clogged by a small piece of the foil. Furthermore, it is important that the force which needs to be applied for initially piercing or puncturing the foil is appropriate for the user. A problem often encountered with known applicators is a permanent change of the force which has to be applied during the discharging process, in particular after the foil has been pierced.
  • a discharger for discharging a predetermined amount of fluid comprises
  • the discharger in general, may be adapted to be used in the medical, dental or veterinary field or in the health care sector.
  • the fluid to be discharged is in particular a liquid which includes at least one medical, dental or veterinary agent.
  • the present disclosure is, however, not limited to the medical, dental or veterinary sector and can be used in other appliances in which it is desirable to discharge a predetermined amount of fluid in a reliable and uniform manner.
  • the present disclosure is not limited to the discharge of fluids such as liquids. Rather, the discharger as disclosed herein may alternatively be adapted or used to discharge viscous or gel-like materials.
  • the flow channel is centrally located within the piercing tip and extends along the longitudinal second axis defined by the piercing tip, thereby establishing a flow connection to the inlet opening of the discharge section.
  • the flow channel may also be located at an offset position relative to the longitudinal second axis.
  • the flow channel for example, may extend inclined relative to the second axis.
  • the flow channel may also be divided into different axially and radially extending portions.
  • the flow channel may be divided into a first axial portion extending offset from the second axis merging into a radial portion which, in turn, merges into a second axial portion extending offset from the second axis or along the second axis, thereby establishing a flow connection to the inlet opening.
  • the flow channel may be cylindrical and preferably has a diameter between 1/5 and 1/20, more preferably between 1/7 and 1/15, particularly between 1/9 and 1/11 of a diameter of the piercing tip at its widest point.
  • This widest point in general, corresponds to the point where the piercing tip starts to taper.
  • the flow channel may also have an oval, triangular or rectangular cross-section, for instance.
  • the flow channel defines an aperture at the shell surface of the piercing tip, i.e. the aperture represents an interruption of the shell surface.
  • this aperture shall - within the scope of the following discussion of the configuration or shape of the piercing tip - not be considered in detail. This means, the discussion, in general, shall be based on a notional closed shell surface of the piercing tip, unless otherwise stated.
  • an outer surface of the piercing tip is convexly curved or vaulted to the outside.
  • the shell surface of the piercing tip contains at least an outer surface section which has a convexly curved configuration.
  • the piercing tip may also contain at least one surface section which is not convexly curved, but rather is, for example, conical or truncated conical.
  • the shell surface of the piercing tip has an essentially convexly curved configuration. More preferably, the piercing tip has an essentially dome-shaped configuration.
  • the expression "essentially” means that the piercing tip, in particular in an area where the aperture of the flow channel is located, may slightly deviate from a convexly curved or dome-shaped configuration.
  • the piercing tip is essentially rotationally symmetric about the centrally extending longitudinal second axis defined by the piercing tip. It is particularly preferred in this context that the longitudinal second axis corresponds to the longitudinal first axis defined by the housing of the discharger, i.e. the piercing tip is preferably also essentially rotationally symmetric about the longitudinal first axis.
  • the expression "essentially” also implies that the piercing tip, in particular in an area where the aperture of the flow channel is located, may slightly deviate from a rotationally symmetric configuration.
  • a piercing tip having a convexly curved outer surface is especially well-suited not only for reliably piercing a wide variety of barrier foils but also for a continuous and uniform discharge process.
  • the reason for this is that the piercing tip according to the invention combines two features. On the one hand, only a relative moderate and user-friendly piercing force is necessary to initially pierce the foil. On the other hand, in particular due to its convexly curved configuration, the force that must be applied during the displacement of the piercing tip, i.e. during the discharge process, remains essentially constant over a wide distance. This ensures a highly homogeneous discharge, as the user during the discharge process only needs to apply a substantially constant and moderate force.
  • the shape of the piercing tip being essentially rotational symmetrical can be defined by two surface lines of a longitudinal cross-section along the second axis.
  • the point at which the two surface lines intersect may be referred to as apex or vertex of the piercing tip.
  • the two surface lines are essentially axially symmetric relating to the longitudinal second axis.
  • the configuration of the two surface lines is essentially independent of the relative position of the longitudinal cross-section along the second axis.
  • two surface lines resulting from a first longitudinal cross-section along the second axis essentially have the same configuration as two surface lines resulting from a second longitudinal cross-section along the second axis being rotated, for example, by 90° relative to the first longitudinal cross-section.
  • the expression "essentially” implies that the surface lines, in particular in an area where the aperture of the flow channel is located, may slightly deviate from an axially symmetric configuration.
  • the apex of the piercing tip can be an imaginary point located where the two surface lines would intersect if they were not interrupted by the flow channel.
  • Each of the two surface lines can be divided into two or more different sections having different characteristics.
  • a surface line can be divided into a linear section and a curved section, wherein the curved section may be a segment of a circle, an ellipse or a parable.
  • the curved section of the surface line corresponds to the convexly curved outer surface section of the piercing tip.
  • a surface line can be divided into a section being a segment of a circle and a section being a segment of a parable or ellipse.
  • a surface line can be divided into different sections, wherein each section represents a segment of a circle with a different diameter.
  • the two surface lines of a longitudinal cross-section along the second axis intersect at an angle of between 70° and 110°, preferably between 80° and 100°, more preferably between 85° and 95°, in particular approximately 90°.
  • each of the two surface lines can be divided into at least two different sections.
  • a linear section forming the apex of the piercing tip and at least another curved section representing a convexly curved outer surface section of the piercing tip.
  • the outer surface section of the piecing tip is divided into a conical section forming the apex and into at least another convexly curved surface section.
  • the conical section is rather small compared to the convexly curved surface section.
  • the shape of the piercing tip in a longitudinal cross-section along the second axis is defined by two surface lines, each surface line having at least one section defined by a curvature radius being larger than the diameter of the piercing tip at its widest point.
  • each of the two surface lines comprises at least one section being a segment of a circle with a radius being larger than the diameter of the piercing tip at its widest point.
  • this section represents the largest portion of the surface line, wherein it is particularly preferred that the surface line comprises only one further section, preferably having a curvature radius of smaller diameter.
  • the curvature radius being larger than the diameter of the piercing tip at its widest point may have a length of between 1,01 and 1,50, preferably between 1,05 and 1,40, more preferably between 1,10 and 1,30, in particular approximately 1,20, times the diameter of the piercing tip at its widest point.
  • the piercing tip in a longitudinal cross-section along the second axis is defined by two surface lines, each surface line having at least two sections of different curvature radii.
  • each of the two surface lines comprises at least two sections each being a segment of a circle with different radius.
  • the curvature radius of the first section i.e. the section which starts where the piercing tip begins to taper
  • the curvature radius of the second section i.e. the section which follows the first section.
  • the length of the curvature radius of the first section lies preferably in the range between one tenth and half of the curvature radius of the second section.
  • the piercing tip according to another embodiment of the discharger may comprise a ridge at its apex, wherein the ridge preferably is perpendicular to the longitudinal second axis.
  • the ridge can also be inclined or slanted relative to the longitudinal second axis.
  • the length of the ridge preferably lies between 0,05 and 0,40, preferably between 0,10 and 0,35, more preferably between 0,15 and 0,30, times the diameter of the piercing tip at its widest point.
  • the shape of the piercing tip having a ridge at its apex at least slightly deviates from a rotationally symmetric configuration. This, in particular, becomes obvious when considering a first longitudinal cross-section along the second axis and along the ridge as well as a second longitudinal cross-section being rotated by 90° relative to the first longitudinal cross-section.
  • the piercing tip has a ridge-like elevation which preferably is located above an imaginary apex of the piercing tip. This imaginary apex is located where the two surface lines would intersect if they were not interrupted by the ridge.
  • the shape of the piercing tip preferably can be described by two surface lines intersecting at an angle of between 70° and 110°, preferably between 80° and 100°, more preferably between 85° and 95°, in particular approximately 90°. This means that each of the two surface lines is divided into a linear section corresponding to a lateral edge of the ridge and at least one curved section which may have the characteristics as outlined previously.
  • the ridge is interrupted by the flow channel such that two protrusions adjacent to the flow channel are formed.
  • the flow channel divides the ridge into two separated ridge-like protrusions which preferably have about the same dimensions.
  • these protrusions lower the piercing force that has to be initially applied for puncturing a barrier foil.
  • a wide variety of barrier foils can be reliably punctured and the discharger according to the present invention can be applied substantially independent of the type of barrier foil being used.
  • the ridge or the protrusions adjacent to the flow channel are deformable, particularly upon being pressed against a counterpart, wherein the counterpart preferably represents an end section of the receiving space. Due to their deformability the protrusions are compressed when the piercing tip is forced towards the counterpart. In this way, the space between the piercing tip and the counterpart being available for the fluid to be discharged becomes minimized which, in turn, leads to lower amounts of fluid residues at the end of the discharge process. The compression of the protrusions progresses in such a way that the flow channel does not become clogged by the displaced material which is basically due to the position and shape of the protrusions.
  • the piercing tip is preferably at least partially positioned inside the housing so as to protrude into the receiving space of the carriage when the carriage is being moved towards the distal end of the housing.
  • the piercing tip thereby establishes a flow connection for the fluid to the inlet opening of the discharge section.
  • a separate container being adapted to be loaded into the receiving space and containing the predetermined amount of fluid can be loaded into the carriage or the predetermined amount of fluid to be discharged can be directly stored inside the receiving space.
  • the amount of the fluid either contained in the container or in the carriage itself may for example range between 0,1 and 10 ml, preferably between 0,5 and 5 ml.
  • the fluid inside the receiving space or container is protected from environmental influences by a breakable seal, in particular a barrier foil.
  • a separate container is applied to avoid a direct storage of the fluid inside the receiving space of the carriage.
  • the carriage in this way, can be reusable since it normally does not come into contact with the fluid to be discharged. Even if the carriage or the whole discharger is a disposable product by providing a separate container containing the fluid storage costs for the discharger can be reduced since the discharger and the containers can be stored independently.
  • an inner contour of the receiving space or an inner contour of the container is essentially complementary in shape to the piercing tip.
  • the expression "essentially”, in this context, implies that the shape of the inner contour can deviate from an exact complementary shape of the piercing tip in an area where the aperture of the flow channel is located and, where applicable, in an area where the protrusions are located.
  • This design allows for a nearly complete discharge of the fluid since the space available for the fluid can be completely filled by the piercing tip resulting in a nearly complete displacement of the fluid.
  • the piercing tip being essentially rotationally symmetric is of particular advantage since a special orientation of the piecing tip relative to the complementary shaped and accordingly also rotationally symmetric inner contour of the receiving space or the container is not necessary to establish a form-fitting connection. This also facilitates the assembly of the discharger since neither the piercing tip nor the complementary designed receiving space or container needs to adopt a preferred orientation direction.
  • the piercing tip comprising two deformable protrusions can establish a form-fitting connection to the inner contour of the receiving space or the container even if this inner contour is rotationally symmetric and has not been specially adapted to the protrusions. Due to the deformability of the protrusions the piercing tip comprising the deformable protrusions is able to adapt to the rotationally symmetric inner contour of the receiving space or the container upon applying a force.
  • the piercing tip is formed integrally with the housing and/or the discharge section. In other words, it is preferable that the piercing tip and the housing and/or the discharge section are formed in one piece.
  • the piercing tip is formed as a unitary separate piece which, for example, can be linked to the housing and/or the discharge section for example by a plug connection.
  • the piercing tip is formed by injection molding and preferably consists of an elastically deformable polymer selected from the group comprising polypropylene, cyclic olefin polymer, polyethylene, polyamide, polybutylenterephthalat and polymethyl methacrylat.
  • the discharger and/or the container may be fabricated from any suitable material.
  • the material is plastic, wherein the same poly-mers as named above are suitable.
  • the material may be glass, metal or an alloy.
  • the discharger further comprises securing means which are adapted to prevent the carriage from being unintentionally moved from a starting position along the longitudinal first axis. These securing means facilitate the handling of the discharger by avoiding unintentional operation of the carriage.
  • the securing means may comprise a pin/slot arrangement having at least one pin formed at the carriage and at least one slot formed in a wall of the housing.
  • the pin is guided by the slot.
  • the slot may comprise a first portion extending in a circumferential direction and merging into an axial slot portion extending along the longitudinal first axis of the discharger.
  • Means such as wing-like projections can be formed at an outer side of the housing so that the discharger may be used like a common syringe by holding the discharger with one finger at each projection and with the thumb on a proximal end of the carriage or of a container loaded into the carriage, thereby providing for a comfortable single-hand operation of the discharger.
  • Another aspect of the invention relates to a discharge system comprising a discharger as disclosed herein and at least one container holding an amount of fluid to be discharged, wherein the container is adapted to be loaded into the receiving space of the carriage of the discharger.
  • a further aspect of the invention relates to the use of a discharger as disclosed herein or of a discharge system as disclosed herein, for discharging a liquid including at least one medical, dental or veterinary agent, wherein in particular the amount of the liquid lies in the range of 0,1 to 10 ml, preferably between in the range of 0,5 to 5 ml.
  • the discharger and the discharge system as provided by the present disclosure belong to the group consisting of systems without protection cap.
  • Fig. 1 shows a discharger 10 comprising a housing 12, a carriage 26 and a discharge section 18.
  • the housing 12 defines a longitudinal first axis A 1 and is provided with opposing wing-like protrusions 44 similar to a common disposable syringe.
  • the carriage 26 is received in a proximal end region 14 of the housing 12.
  • the carriage 26 defines a receiving space 28 into which a container 34 has been loaded through an opening 35 of the carriage 26.
  • the discharger 10 and the container 34 form a discharge system and are generally designed as disposable articles intended for one-time use only.
  • the discharge section 18 of the discharger 10 comprises a discharge passage 20 and extends from within the housing 12 through a tapered distal end 16 towards a thickened distal end portion 17.
  • the distal end portion 17 can be formed integrally with the discharge passage 20 or can be made as a separate component connected in a suitable manner to the discharge passage 20.
  • the distal end portion 17 moreover defines an outlet opening 24.
  • the distal end portion 17, in general, can be adapted to the type and site of application and can be in the form of or comprise a spray head, a needle (cannula), a brush, a sponge or a pipette.
  • a spray head or a sponge can be of advantage, whereas selective applications might require a needle or a plain tube of small diameters.
  • the discharger 10 has securing means 48 comprising a slot 47 being formed in the housing 12 and cooperating with a pin 46 being formed at the carriage 26.
  • the slot 47 is divided into a circumferential portion 49a and into a longitudinal portion 49b extending in parallel to the first axis A 1 .
  • the discharger 10 in Fig. 1 is shown in an initial state of use with the pin 46 being situated at the end of the circumferential portion 49a of the slot 47. In this initial state of use a movement of the carriage 26 along the longitudinal axis A 1 towards the distal end 16 is prevented.
  • Fig. 2 shows the discharger 10 in a starting position with the pin 46 being situated at the intersection point of the circumferential portion 49a and the longitudinal portion 49b of the slot 47. In this state the carriage 26 is movable along the longitudinal axis A 1 towards the distal end 16.
  • Fig. 3 shows the discharger 10 in a final discharge position with the pin 46 being situated at the end of the longitudinal portion 49b of the slot 47. In this state the carriage 26 is completely situated inside the housing 12.
  • Fig. 4 shows the discharger 10 of Fig. 1 in a partial cross-section along the longitudinal first axis A 1 .
  • the discharge section 18, however, is not shown in cross-section.
  • Fig. 4 reveals the container 34 being located inside the receiving space 28 of the carriage 26.
  • the container 34 is made as a capsule which has a cylindrical outer shape and is filled with a fluid 11 to be discharged.
  • the fluid 11 inside the container 34 is located in a fluid reservoir 41 which is protected from the environment by a breakable seal 42 in the form of a foil. This becomes even more obvious in the enlarged portion of Fig. 4 depicted in Fig. 5 .
  • the amount of the fluid 11 inside the fluid reservoir 41 is approximately 0,5 ml.
  • a circumferential shoulder 29 of the carriage 26 acts as an axial stop for the container 34 when being loaded into the receiving space 28 of the carriage 26.
  • Fig. 4 reveals a sleeve portion 13 being integrally formed with the housing 12.
  • the discharge passage 20 is fitted into the sleeve portion 13.
  • a proximal end portion 15 of the sleeve portion 13 is fitted into a distal cylindrical portion 21 of the carriage 26 through a distal opening thereof.
  • the housing 12 generally has a cylindrical outer shape with a constant inner diameter.
  • a flange 27 is formed integrally with the distal cylindrical portion 21.
  • the proximal end portion 15 of the sleeve portion 13 comprises a piercing tip 30 having a flow channel 32 being connected to an inlet opening 22 of the discharge passage 20.
  • the piercing tip 30 is formed integrally with the sleeve portion 13 of the housing 12 and defines a centrally extending longitudinal second axis A 2 which in this embodiment corresponds to the first axis A 1 .
  • the flow channel 32 extends along the longitudinal first or second axis A 1 , A 2 .
  • the configuration of the piercing tip 30 becomes clear.
  • the piercing tip 30 has a convexly curved outer surface 31 and moreover comprises two protrusions 40 being adjacent to the flow channel 32, respectively.
  • the protrusions originate from a ridge 39 that has been interrupted by the flow channel 32 during the manufacturing process (see Fig. 10 ).
  • Fig. 5 further reveals that the fluid reservoir 41 has a rotationally symmetric inner contour 38. Apart from the protrusions 40, the inner contour 38 is complementary to the outer shape of the piercing tip 30.
  • Fig. 6 shows the discharger 10 in its final discharge position, i.e. the carriage 26 has been fully moved towards the distal end 16 into the housing 12.
  • the piercing tip 30 and at least the proximal end portion 15 of the sleeve portion 13 are located in the fluid reservoir 41 of the container 34.
  • the seal 42 has been pierced and the fluid 11 has been displaced.
  • the protrusions 40 have been compressed such that the piercing tip 30 and the inner contour 38 of the fluid reservoir 41 establish a form-fitting connection.
  • Fig. 7 shows detailed views of the piercing tip 30 of Figs. 4 to 6 .
  • the upper pane contains a cross-sectional view along the longitudinal second axis A 2 and along the two protrusions 40.
  • the two protrusions 40 are located adjacent to a proximal entry opening of the centrally located flow channel 32.
  • the shape of the piercing tip 30 is defined by two surface lines 33a, 33b which are axially symmetric.
  • Each surface line 33a, 33b consists of three sections S 1 , S 2 , S 3 , wherein each section S 1 , S 2 , S 3 is defined by a curvature radius R 1 , R 2 , R 3 .
  • each section S 1 , S 2 , S 3 is a segment of a circle.
  • the length of the curvature radii R 1 , R 2 , R 3 is indicated by respective arrows.
  • the radius R 1 of the first section S 1 is roughly one fifth of the radius R 2 of the second section S 2 .
  • the length of the radius R 2 of the second section S 2 is more than half the length of a diameter D W of the piercing tip 30 at its widest point (see lower pane).
  • the third section S 3 particularly defines the shape of the protrusions 40.
  • the length of the corresponding radius R 3 is approximately half of the radius R 1 .
  • the convex shape of the piercing tip 30 is mainly defined by sections S 1 and S 2 .
  • the lower pane of Fig. 7 shows a side view of the piercing tip 30 shown in the upper pane after a rotation by 90°.
  • the sections S 1 , S 2 , S 3 are indicated by lines perpendicular to the second axis A 2 . It is clearly visible that the surface lines defining section S 3 in this view run linear and intersect at an angle ⁇ of approximately 90°. Thus, the protrusions 40 in this view have a triangular profile.
  • FIG. 10 A perspective view clearly indicating the convex shape of the outer surface of the piecing tip 30 according to Figs. 4 to 7 is also shown in Fig. 10 .
  • Fig. 8 in its upper pane shows a cross-section along the longitudinal second axis A 2 of another embodiment of the piercing tip 30 according to the present invention.
  • Each surface line 33a, 33b consists of two sections S 1 , S 2 each being a segment of a circle having a corresponding radius R 1 , R 2 .
  • R 1 , R 2 the same applies as for Fig. 7 .
  • the flow channel 32 is not centrally located within the piercing tip 30 but is located at an offset position relative to the second axis A 2 .
  • Fig. 9 in its upper pane shows a cross-section along the longitudinal second axis A 2 of a further embodiment of the piercing tip 30 according to the present invention.
  • the piercing tip 30 is rotationally symmetric about the second axis A 2 since the flow channel 32 is centrally located within the piercing tip 30.
  • Each surface line 33a, 33b consists of two sections S 1 , S 2 each being a segment of a circle having a corresponding radius R 1 , R 2 .
  • R 1 , R 2 Regarding the length of the radii R 1 , R 2 the same applies as for Figs. 7 and 8 .
  • any of the three piercing tips according to Figs. 7 to 8 are able to initially punctuate a foil with a moderate and user-friendly piercing force, wherein the piercing tip comprising two protrusions 40 has shown the best results in this regard.
  • the convexly curved configuration is mainly responsible that the force which needs to be applied during the movement or displacement of the piercing tip remains essentially constant over a wide distance.
  • This constant force distribution was shown by all of the three piercing tips according to Figs. 7 to 9 and can therefore be regarded as independent of the shape in the rather small region of the apex of the piercing tip. With particular benefit it is therefore possible to ensure a highly homogeneous discharge by merely adapting the shape in the apex region of the piercing tip to the characteristics of the applied foil.
  • the carriage 26 including the container 34 needs to be pushed towards the distal end 16 into the housing 12.
  • the securing means 48 prevent the carriage 26 from being unintentionally pushed into the housing 12 when the discharger is in an initial state of use.
  • the piercing tip 30 is still positioned spaced apart from the seal 42 of the container 34, i.e. the piercing tip 30 does not yet protrude into the fluid reservoir 41 of the container 34.
  • the user In order to discharge the fluid 11, the user, firstly, has to deliberately rotate the carriage 26 counter-clockwise with respect to the housing 12 until the pin 46 is aligned with the axial portion 49b of the slot 47.
  • the outer surface of the carriage 26 may be roughened or provided with longitudinal grooves providing a non-slip surface.
  • the carriage 26 now being in the starting position is movable along the longitudinal axis A 1 . From the starting position the carriage 26 and the container 34 together can be actuated like a push button which can be pressed by the user with a thumb while counteracting this actuation by holding the housing 12 with two fingers behind the projections 44.
  • the piercing tip 30 initially punctuates and then pierces the seal 42.
  • the piercing tip 30 enters into the fluid reservoir 41 of the container 34, thereby urging the fluid 11 out of the container 34 through the flow channel 32 being connected to the discharge passage 20.
  • the complementary shapes of the piercing tip 30 and the inner contour 38 of the fluid reservoir 41 ensure that essentially no residual amounts of fluid 11 remain within the container 34.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • General Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Engineering & Computer Science (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Biomedical Technology (AREA)
  • Anesthesiology (AREA)
  • Vascular Medicine (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Nozzles (AREA)
EP15182941.3A 2015-08-28 2015-08-28 Discharger with improved piercing tip Withdrawn EP3135329A1 (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
EP15182941.3A EP3135329A1 (en) 2015-08-28 2015-08-28 Discharger with improved piercing tip
CN201680050491.8A CN107921213A (zh) 2015-08-28 2016-08-19 具有改进的穿刺尖端的排放器
KR1020187008911A KR20180048860A (ko) 2015-08-28 2016-08-19 향상된 피어싱 팁을 가진 배출기
EP16759997.6A EP3316936B1 (en) 2015-08-28 2016-08-19 Discharger with improved piercing tip
JP2018510979A JP6873976B2 (ja) 2015-08-28 2016-08-19 改善された穿孔先端部を備えるディスチャージャー
PCT/EP2016/069720 WO2017036823A1 (en) 2015-08-28 2016-08-19 Discharger with improved piercing tip
BR112018003432A BR112018003432A2 (pt) 2015-08-28 2016-08-19 descarregador com ponta perfurante aperfeiçoada
US15/755,838 US11040143B2 (en) 2015-08-28 2016-08-19 Discharger with improved piercing tip
US17/319,510 US11964134B2 (en) 2015-08-28 2021-05-13 Discharger with improved piercing tip

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15182941.3A EP3135329A1 (en) 2015-08-28 2015-08-28 Discharger with improved piercing tip

Publications (1)

Publication Number Publication Date
EP3135329A1 true EP3135329A1 (en) 2017-03-01

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Application Number Title Priority Date Filing Date
EP15182941.3A Withdrawn EP3135329A1 (en) 2015-08-28 2015-08-28 Discharger with improved piercing tip
EP16759997.6A Active EP3316936B1 (en) 2015-08-28 2016-08-19 Discharger with improved piercing tip

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP16759997.6A Active EP3316936B1 (en) 2015-08-28 2016-08-19 Discharger with improved piercing tip

Country Status (7)

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US (2) US11040143B2 (zh)
EP (2) EP3135329A1 (zh)
JP (1) JP6873976B2 (zh)
KR (1) KR20180048860A (zh)
CN (1) CN107921213A (zh)
BR (1) BR112018003432A2 (zh)
WO (1) WO2017036823A1 (zh)

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EP3403947A1 (en) * 2017-05-17 2018-11-21 Sulzer Mixpac AG Container, discharger and method of assembling a discharger
EP3599031A1 (en) * 2018-07-26 2020-01-29 Sulzer Mixpac AG Discharger, container, dispensing part, activation part and method of assembling and using a discharger

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EP3403729A1 (en) * 2017-05-17 2018-11-21 Sulzer Mixpac AG Discharger, static piston and method of discharging
EP3403730A1 (en) * 2017-05-17 2018-11-21 Sulzer Mixpac AG Discharger and method of discharging

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Also Published As

Publication number Publication date
JP6873976B2 (ja) 2021-05-19
EP3316936B1 (en) 2021-09-29
KR20180048860A (ko) 2018-05-10
BR112018003432A2 (pt) 2018-09-25
US20210260296A1 (en) 2021-08-26
CN107921213A (zh) 2018-04-17
US11964134B2 (en) 2024-04-23
JP2018525166A (ja) 2018-09-06
WO2017036823A1 (en) 2017-03-09
EP3316936A1 (en) 2018-05-09
US11040143B2 (en) 2021-06-22
US20180326154A1 (en) 2018-11-15

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